Stainless steels
FERVEO INX 307 R
covered electrode · stick electrodeCatalogue only
AWS class
~ E 307-16
EN ISO class
E 18 8 Mn R 32
Tensile strength (Rm)
600–770 MPa
Classification
| AWS class | ~ E 307-16 |
|---|---|
| EN ISO class | E 18 8 Mn R 32 |
Purpose
- Rutile variant of the INX 307 family (~E 307-16 / E 18 8 Mn R 32) — same dissimilar-steel and manganese-steel joining use, with easier arc starting and bead appearance than the basic version.
Why it works
Same principle as INX 307 B, but rutile-coated: easier to strike and hold an arc, including on AC, trading a little toughness for better handling.
Fields of application
- Joining of high-resistance alloyed and unalloyed steels, heat-resistant steels, Cr-stainless steels, 14% Mn steels.
- Joint and filler welding between dissimilar metals.
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.11 |
| Cr | 19 |
| Mn | 4.5 |
| Ni | 8.5 |
| Si | 1 |
Mechanical properties
| Tensile strength (Rm) | 600–770 MPa |
|---|---|
| Yield strength (Rp0.2) | 390 MPa |
| Elongation (A5) | 30 % |
| Impact energy (KV) | 47 J (20 °C) |
Process
| Polarity | DC+/AC |
|---|---|
| Positions | PAflatPBhorizontal-verticalPChorizontalPDhorizontal-overheadPEoverheadPFvertical-up |
| Re-drying | 120–200 °C / ≥2 h |
Sizes and part numbers
| Ø | Length | Current | Request |
|---|---|---|---|
| 2.5 mm | 250 mm | 60–80 A | |
| 3.2 mm | 350 mm | 80–110 A | |
| 4 mm | 350 mm | 110–140 A |
Cross-reference
| Replaces EI 307R (Magmaweld) | Direct replacement |
| Replaces EIS 307 (Magmaweld) | Direct replacement |
| Replaces NIC 307 (Nicrotec) | Direct replacement |
| Replaces SUPRANOX RS 307 (Oerlikon) | Direct replacement |
Equivalence refers to the classification (AWS / EN ISO), not to product identity. In applications with a qualified procedure (WPS), validate the substitution before use.
Advantages
- Austenitic weld metal resistant to thermal shock, tough down to -100°C.
- Rutile coating: easy arc starting and handling — better manageability than the basic version (FERVEO INX 307 B).
Limitations
- Lower toughness than the basic version (FERVEO INX 307 B) in exchange for better arc manageability.